Send anything into Keap. Reliably. With error handling.
Inbound and outbound webhook integration with Keap Max Classic (Infusionsoft): payload parsing, dedupe, tagging, campaign triggers, retries, and failure alerts. For when your tool has an API but no native Keap connector.
Who this is for.
Businesses with a custom app, internal tool, or third-party service that needs to talk to Keap Max Classic and there is no native connector available.
- Developers needing to push contact and event data from a custom app into Keap.
- Businesses whose ThriveCart, SamCart, or custom checkout needs to trigger Keap fulfilment.
- Anyone whose existing webhooks fail with no alert with no logs and no alerts.
- Teams who need Keap to fire outbound webhooks to another system on contact changes.
What this integration fixes.
Webhooks failing with no alert
Payload arrives, nothing happens, no error visible. I add logging, retries, and failure alerts so you know when something breaks.
Payloads not parsed cleanly
Nested JSON, arrays, and conditional fields not landing on the contact. I parse and map every relevant field.
Duplicate contacts from inbound webhooks
Every event creates a new record. I add dedupe by email, phone, or external ID.
Race conditions on rapid events
Two webhooks fire 50ms apart and overwrite each other. I add ordering and queue logic.
Outbound webhooks to other systems
You need Keap to notify another app on contact change. I set up outbound webhooks with the right triggers and payload.
No error alerts
When something breaks, nobody knows. I wire alerts to Slack, email, or your monitoring tool of choice.
How I build webhook integrations with Keap.
Native first, lightweight middleware where the payload needs transformation.
Inbound
- Keap REST API contact create/update
- Native Keap webhook endpoint
- Tag application
- Campaign goal advancement
Outbound
- Keap HTTP POST actions
- Event-triggered outbound webhooks
- Payload customisation
Middleware (when needed)
- Zapier
- Make.com
- n8n
- Pabbly
- Custom lightweight Node or Python worker
Reliability layer
- Retry logic
- Dead-letter logging
- Slack or email failure alerts
- Idempotency keys
What's included
- Discovery: source system, payload shape, expected behaviour in Keap
- Endpoint setup (native or middleware)
- Field mapping document
- Dedupe and idempotency logic
- Retry handling and failure alerts
- End-to-end testing with real payloads
- Documentation: payload schema, field map, troubleshooting runbook
What's not included
- Building the source application or modifying its code
- Hosting costs for middleware (Zapier, Make, custom workers)
- Writing email or campaign copy
- Rebuilding the whole CRM (see CRM & Automation Support)
Recent webhook work.
ThriveCart to Keap with refund handling
Purchase webhook tags and fulfils, refund webhook removes access, all with dead-letter logging.
Custom membership app to Keap
Internal Node app posts membership events to a Make.com scenario that updates Keap contacts and triggers the right campaigns.
Keap outbound to billing system
Contact status change in Keap pings the billing system via outbound webhook to update subscription state.
Common questions
Webhooks + Keap Integration FAQ
Other ways I support businesses
Get your webhooks talking to Keap, reliably.
Send me a sample payload and what you want it to do in Keap: I'll scope the build on a call.
Contact Me